a(n) = (12*n + 2)^4.

Terms

a(0) =16a(1) =38416a(2) =456976a(3) =2085136a(4) =6250000a(5) =14776336a(6) =29986576a(7) =54700816a(8) =92236816a(9) =146410000a(10) =221533456a(11) =322417936a(12) =454371856a(13) =623201296a(14) =835210000a(15) =1097199376a(16) =1416468496a(17) =1800814096a(18) =2258530576a(19) =2798410000a(20) =3429742096a(21) =4162314256a(22) =5006411536a(23) =5972816656a(24) =7072810000a(25) =8318169616